You may find yourself very disappointed.

The recent vehicle repec is because they are radically changing vehicles and the skill tree. If they were to do the same for the infantry tree in the future I'd expect the same. Since there is no indication they will it's safe to assume they won't.

I too anticipate the new racial variants, and think it is unfair that they have not been released yet. In CCPs defense there has been more than enough time to acquire enough SP to fully spec into a couple of suits and weapons currently out and still be able to spec into a new suit or weapon. What harm do you have speccing into an Amarr heavy and using it now, while waiting for another heavy, and still having it in the future? All the same core skills will still be used, it won't take that long to have a completely upgraded suit if you invest heavily in cores.

Why do they have to give you a respec? In one week you can get SP to take a suit to standard. In two you can take it to advanced, in 3-4 you can take it to Proto. If the suit is so important to you it's worth either saving up for or grinding less than a month for. If not you just want to find an excuse for instant gratification.

So SP is precious to us all, but it doesn't take much to take a suit or weapon to standard. If you can't enjoy it or learn to use it well at standard in a pub match then you need to practice, this game has a lot of numbers but one thing I've learned is that teamwork and skill can outdo gear 95% of the time.

If you must go to Proto sooner for some important reason, than there is always the option of buying AUR equipment.

Heavens forbid that you put money in this game to speed up the time it takes to get better gear, through boosters and the AUR market. This is why CCP doesn't want respecs, the urge to get better gear and try new things is what funds this game. Luckily it's not pay to win, it's just pay to do things faster. It's still better to take suit and weapon skills all the way up to maximize their potential.

These concepts should be pretty simple to understand.
Rebalances will happen, so don't expect the best thing to be king for long.
Trying new things doesn't require much, either just a little SP or a little Aur.
Proto isn't the only way to play this game. If you can't run it in standard or advanced than you need to get better.
An advanced suit with maxed core skills and modules will do better than proto with standard modules.
Core skills are a very useful and safe SP investment as they passively raise the attributes of every suit.

TL;DR Respecs and the idea that they are on the way hurts their bottom line, so unless there is a radical infantry tree change it's best to assume that there isn't going to be a respec.